Isuzu Workshop Service and Repair Manuals

Valve Guide: Specifications

Diameter of Valve Stem

Intake

Standard ......................................................................................................................................  5.977 mm - 5.959 mm (0.2353 inch - 0.2346 inch)
Limit .......................................................................................................................................................................................  5.90 mm (0.2323 inch)

Exhaust

Standard ......................................................................................................................................  5.952 mm - 5.970 mm (0.2343 inch - 0.2350 inch)
Limit .......................................................................................................................................................................................  5.90 mm (0.2323 inch)

Inside Diameter of the Vale Guide

Inlet clearance

Standard ......................................................................................................................................  0.023 mm - 0.056 mm (0.0009 inch - 0.0002 inch)
Limit .....................................................................................................................................................................................  0.20 mm (0.00787 inch)

Exhaust clearance

Standard ......................................................................................................................................  0.030 mm - 0.063 mm (0.0012 inch - 0.0025 inch)
Limit .....................................................................................................................................................................................  0.20 mm (0.00787 inch)

Valve guide upper end height

(Measured from the cylinder head upper face) .............................................................................................................................  13.0 mm (0.5118 inch)

Protrusion of valve stem

Intake

Standard ................................................................................................................................................................................  39.32 mm (1.5480 inch)
Limit .....................................................................................................................................................................................  39.47 mm (1.5539 inch)

Exhaust

Standard ..................................................................................................................................................................................  39.3 mm (1.5472 inch)
Limit .....................................................................................................................................................................................  39.45 mm (1.5531 inch)

Valve seat contact width

Standard ..........................................................................................................................................................................................  1.1 mm (0.0433 inch)
Limit ...............................................................................................................................................................................................  1.7 mm (0.0669 inch)